Abstract : This report describes the work being done on the Minicomputer Assisted Reprogramming System (MARS). MARS provides hand held calculator software development tools, simulators, software translators and code optimizers for the Texas Instruments Model 59 calculator and the Hewlett Packard Models 67 and 97. This report describes two years of software development on these topics and the design of a curve fitting assistance and graphics package also used in the development of calculator software.